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Installer's Guide
H. LEAK CHECK
1.
Using a manifold
gauge,
connect an external supply of
dry
nitrogen to the gauge port on the liquid line.
2. Pressurize the connecting lines and indoor coil to 150
PSIG maximum.
3. Leak check brazed line connections using soap bubbles.
Repair leaks
(if
any) after relieving pressure.
4. Evacuate and charge the system per the instructions
packaged with the outdoor unit.
L CONDENSATE DRAIN PIPING
Condensate drain connections are located in the drain pan
at the bottom of the coil/enclosure assembly. The female
threaded fitting protrudes outside of the enclosure for ex-
ternal connection.
1. The drain hole in the drain pan must be cleared of all
insulation.
2. Insulate the drain line to prevent sweating and dripping.
It is always recommended that an auxiliary drain pan be
installed under a horizontally installed evaporator coil or
90% gas furnace. Connect the auxiliary drain line to a sepa-
rate drain line (no trap is needed in this line).
IMPORTANT: Plug all drain line connection(s) not
used. Do NOT use heat or torch near drain fittinp.
Field fabricated trap
Figure 13
CAP OR PLUGJ'(
• 1111(1)1io11111(,..
Close as possible
1
Trap must be within 4'
I
of furnace I air handler
condensate drain connection.
J. INSPECTING THE COIL
The two piece door (3-piece on 24.5" wide models) allows
removal of the outer casing doors without interference from
refrigerant or condensate lines. Once the outer doors are
removed the split inner coil panels can be moved to easily
allow inspection of the inside of the coil. The coil can be
removed to the outside where it can be washed with a water
hose. See Service Guide UN-SVGOOlA-EN for details.
The foil covered insulation on the 4TXC coils should be
wiped down and residual
dirt
and dust should be vacuumed
up to maintain good air quality. See Figure 14.
Figure 14
K. DUCT CONNECTIONS
The supply and return air duct should be connected to the
unit with a flame retardant duct connectors. Duct flange
connections are provided at both supply and discharge
openings of the coil .
L OPERATIONAL AND CHECKOUT PROCEDURES
"Operational Procedure" for the system installation can be
found
in
the outdoor unit Installer Guide and will be com-
patible with this coil
PRESSURE DROP CHARACHTERISTICS FOR COOLING AND HEAT PUMP COILS
AIRFLOW (CFM) VS. PRESSURE DROP
PRESSURE DROP (INCHES OF WATER COLUMN)
Model
.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
4TXCB003CC3HCB
510
715
875
1005
1125
1230
1325
1415
4TXCB004CC3HCB
465
685
865
1015
1155
1280
1395
1505
4TXCC005CC3HCB
550
820
1030
1210
1375
1525
1665
1795
4TXCC006CC3HCB
460
715
930
1115
1290
1450
1600
1740
4TXCC007CC3HCB
550
820
1030
1210
1375
1525
1665
1795
4TXCC008CC3HCC
680
965
1190
1375
1540
1685
1820
1950
4TXCD009CC3HCC
670
1000
1250
1470
1670
1850
2020
2180
4TXCD010CC3HCC
670
1000
1250
1470
1670
1850
2020
2180
6
18-AH44D1-6
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